IIT JEE

Tangent Line Hyperbola Relationship (very optional)
How a tangent line relates to a hyperbola. Might be useful for some competitive exams where there isn't time to derive (like we are doing in this video)

2010 IIT JEE Paper 1 Problem 50
Hyperbola Eccentricity

Normal vector from plane equation
Figuring out a normal vector to a plane from its equation

Point distance to plane
Distance between a point and a plane in three dimensions

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